| abstract |
Disclosed is an electrochemical cell (2) which, in the charged state, comprises a positive electrode, an aqueous electrolyte and a negative electrode, the positive electrode comprising a metal oxide, for example a lead oxide, the negative electrode comprising a support and an active material, the active material of the negative electrode being a metal alloy chosen from a copper-based alloy, a cadmium-based alloy, a nickel-based alloy, a manganese-based alloy, a tin-based alloy, a zinc-based alloy, or an alloy based on cadmium and tin, the electrolyte comprising sulfuric acid and a dissolved active material, in the form of sulfates of the metals forming the alloy of the active material of the negative electrode, the concentration of sulfuric acid being greater than 100 g/l, and the concentration of dissolved active material ranging from 0 to 400 g/l, and preferably from 0 to 200 g/l. |